LabVIEW OS Problems?

[Eric May]

I have recently started using LabView VIs on a PC with Win NT.
The VIs were written and work on PCs with Win 95 and Win 98. The change to
the
NT machine was necessary as it contains our GPIB card. However, I am now
experiencing the following two problems:

1. VISA VIs cannot find the two working serial ports: all they find are the
GPIB
instruments. However, I can communicate with the serial ports using the serial
VIs

2. I cannot write to internal registers (I want to communicate with the
parallel port)
using the VIs "OutPort" and "InPort". Trying to do so generates the following
two
error messages in succession

"Capability Not Supported, VI stopped at node 0x1D8 of sub-VI "InPort.vi"

"Failure: 'exec.c', line 1910 LabVIEW vers
ion 5.1.1 Goto www.ni.com/failure
or
contact National Instruments" (which I have done)

LabVIEW then proceeds to quit.

Any ideas? The only thing I can think of is a conflict between LV and NT,
which I
am not very familiar with. I think this because everything works OK on other

machines with the same version of LV (5.1.1) but with Win 98 or Win 95

Eric May

[Kevin_work]

Eric May wrote:

> I have recently started using LabView VIs on a PC with Win NT.
> The VIs were written and work on PCs with Win 95 and Win 98. The change to
> the
> NT machine was necessary as it contains our GPIB card. However, I am now
> experiencing the following two problems:
>
> 1. VISA VIs cannot find the two working serial ports:
>
> 2. I cannot write to internal registers
> using the VIs "OutPort" and "InPort". TEric May

Eric,

There are known issues with NT and the ports.
The problem is security in NT.

Go to the NI website and search for things like "NT" "serial"
etc. You should find a downloadable file named something like hwaccs or some
sort.

Once installed this should allow you to do all the things that you want.

BE WARNED - This does compromis
e (to some degree) the security
of the NT machine. I have never heard of any problems with this though.

Kevin Kent